Keysight DSOX3012T, User Manual

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86 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
3
Vertical Controls
When specifying the attenuation factor in decibels, you can select values from
-20 dB to 80 dB.
If Amps is chosen as the units and a manual attenuation factor is chosen, then the
units as well as the attenuation factor are displayed above the Probe softkey.
To specify the probe skew
When measuring time intervals in the nanoseconds (ns) range, small differences in
cable length can affect the measurement. Use Skew to remove cable-delay errors
between any two channels.
1 Probe the same point with both probes.
2 Press one of the probes associated channel key.
3 In the Channel Menu, press Probe .
4 In the Channel Probe Menu, press Skew ; then, select the desired skew value.
Each analog channel can be adjusted ±100 ns in 10 ps increments for a total of
200 ns difference.
The skew setting is not affected by pressing [Default Setup] or [Auto Scale] .
To calibrate a probe
The Calibrate Probe softkey guides you through the process of calibrating probes.
For certain active probes, such as InfiniiMax probes, the oscilloscope can
accurately calibrate its analog channels for the probe. When you connect a probe
that can be calibrated, the Calibrate Probe softkey in the Channel Probe Menu
becomes active.
To calibrate one of these probes:
1 First, plug your probe into one of the oscilloscope channels.
This could be, for example, an InfiniiMax probe amplifier/probe head with
attenuators attached.
2 Connect the probe to the left side, Demo 2, Probe Comp terminal, and the
probe ground to the ground terminal.